code: def test_hash_string():
      hashed = hash_string("John Doe")
      assert isinstance(hashed, str)
      assert len(hashed) == 64
  
file_path: data-describe/tests/test_detection.py
imports: import pytest
  from data_describe.compat import _compat, _is_dataframe
  from data_describe.privacy.detection import sensitive_data, SensitiveDataWidget, presidio_engine
  from data_describe.privacy.detection import identify_pii, redact_info, encrypt_text, hash_string
label_desc: Use image node_id 10 for calling a global function with example usage: test_hash_string() without return types